CN201476304U - Household gas water heater flue heat collection and energy saving device - Google Patents

Abstract

The utility model relates to a flue heat collection and energy saving device of a household gas water heater. Including the shell, the feature is that the bottom surface of the shell is provided with inlet and outlet pipe holes and condensate drain pipes, and the shell is built with longitudinal and segmented fins, and each horizontal series is arranged on the fins, and the vertical intervals are evenly distributed and the corresponding holes The water pipes at the place are evenly distributed with holes corresponding to the two ends of the water pipes on the longitudinal and segmented fins, and the front and rear ends are extended with flanging. The left and right clapboards on the two ends of the outer water pipes and the condensing heat exchangers formed by "U" shaped elbows that are connected to the ends of the water pipes protruding from the holes on the left and right clapboards. The water port is connected to the water inlet pipe with a valve, the water outlet of the water pipe is connected to the water outlet pipe, and the front and rear ends of the shell are connected with the front and rear covers with the smoke inlet and outlet. The utility model can be suitable for being connected and matched with domestic gas water heaters.

Description

Household gas water heater flue heat collection and energy saving device

Technical field:

The utility model relates to a household gas water heater, in particular to a heat collecting and energy-saving device for the flue of the household gas water heater.

Background technique:

At present, most of the domestic gas water heaters sold in the domestic market will produce a large amount of high-temperature flue gas and discharge it directly to the outside during combustion. Generally, the temperature of the flue gas at the outlet of the exhaust pipe has been tested as high as 150-180 ° C, and some are even higher. . Take the 12L gas water heater used by a family of three as an example, due to the influence of the strong exhaust air in the gas water heater, about 15% of the heat energy is in the combustion chamber which is less than 50 cm long, and it is too late to heat the heating surface. In order to maintain the outlet water temperature of the gas water heater, each household needs to use about 6 cubic meters of gas (coal gas, natural gas, liquefied petroleum gas) every month. cubic meters) wasted 30 million cubic meters of gas, which is equivalent to 37.5 million yuan in the case of market gas, and 360 million cubic meters of gas will be wasted throughout the year, equivalent to about 450 million yuan. This is just a city in Shanghai. If the data is extended to the whole country, it will be a very huge number, and the waste is shocking. In addition, a large amount of acid waste gas and water vapor produced by combustion not only take away a large amount of heat energy, but also cause a waste of energy, and the discharge of a large amount of acid waste gas also causes great pollution to the surrounding environment.

Invention content:

The purpose of this utility model is to provide a heat collecting and energy-saving device for the flue of a domestic gas water heater, which can not only effectively utilize high-temperature waste flue gas under normal working conditions of the domestic gas water heater, reduce energy consumption, and reduce pollution, but also has a simple structure, The process is simplified and the manufacturing cost is low.

In order to achieve the above object, the utility model proposes the following design scheme: the flue heat collecting and energy-saving device of the domestic gas water heater of the utility model includes a shell, and the bottom surface of the shell is provided with inlet and outlet pipe holes and condensed water discharge port pipes , the shell has a built-in condensing heat exchanger, and the condensing heat exchanger is composed of vertically and segmentally arranged fins, respectively horizontally arranged in series on the fins at vertically spaced intervals and corresponding holes. The water pipes are evenly distributed with holes corresponding to the two ends of the water pipes on the longitudinal and segmented fins, and the front and rear ends are extended with flanging, and are respectively sleeved on the two outer sides of the longitudinal and segmented fins The left and right clapboards on the two ends of the outer water pipes and the elbows in the shape of "U" that are respectively connected to the ends of the water pipes protruding from the holes on the left and right clapboards are formed. The upper and lower end faces of the right partition and the fins arranged longitudinally and in sections are sealed and connected with the upper and lower inner walls of the shell by sealant. The water inlet pipe hole on the bottom of the shell is fixed with a The water inlet of the water pipe at the hole on the left partition forms a connected water inlet pipe with a valve at the other end, and a water outlet pipe hole on the bottom surface of the shell is fixed with a hole protruding from the hole on the left partition. The water outlet of the water pipe forms a connected water outlet pipe, and the front and rear ends of the shell are respectively fixed and sealed with the front and rear covers with the inlet and outlet of the smoke. At the same time, the outer end surfaces of the flanges extending from the front and rear ends of the board are sealed and fixed by sealant at the positions opposite to the inner walls of the front and rear covers respectively.

A thermal insulation coating is provided on the inner wall of the front cover. A thermal insulation coating is provided on the inner wall of the shell. The other end of the condensed water discharge pipe on the bottom surface of the shell communicates with a condensed water neutralization tank with a waste water outlet pipe.

The flue heat collecting and energy-saving device of the household gas water heater of the utility model is mainly used in conjunction with the household gas water heater. During the working process of the household gas water heater, the heat in the high-temperature waste gas discharged from the household gas water heater is input into the household gas water heater. The cold water is firstly preheated in order to quickly increase the outlet water temperature of the domestic gas water heater. While improving the thermal efficiency of the domestic gas water heater, it not only recovers the waste heat of the high-temperature waste flue gas, saves the consumption of gas, but also effectively improves the household temperature. The service life of the gas water heater.

The utility model adopts left and right partitions on both sides of the condensing heat exchanger mainly composed of fins, water pipes and elbows, and the upper and lower end faces of the fins and the left and right partitions are connected with the upper and lower ends of the shell. The lower inner wall is sealed and connected by sealant, and the outer end faces of the flanges extending from the front and rear ends of the left and right partitions are also sealed and fixed by sealant at the inner walls of the front and rear covers. In this way, the condensing heat exchanger is placed in a relatively airtight environment inside the shell and the front and rear covers, so that the high-temperature exhaust gas passes through the flue gas inlet of the front cover and then concentrates into the longitudinal and segmented fin gaps of the condensing heat exchanger. In the process, the residual heat of the high-temperature waste flue gas can be fully utilized, and the thermal efficiency of the preheated water in the water pipe can be greatly improved, so as to rapidly increase the outlet water temperature of the domestic gas water heater, and also reduce the temperature of the high-temperature waste flue gas discharged outside. The utility model The fins adopt a segmented double drain pipe fin structure, which has a larger thermal area than the coiled structure of a single finned water pipe. The water pipes are arranged at staggered intervals, and the hot air will flow around the water pipes more effectively, improving heat exchange. s efficiency. Both the front cover and the inner wall of the casing are provided with a thermal insulation coating, which can effectively reduce the loss of heat energy when passing through the front cover and the casing, and further improve the utilization efficiency of the heat energy of the high-temperature exhaust gas.

In addition, after the high-temperature waste flue gas passes through the heat exchange of the condensing heat exchanger, the water vapor in the high-temperature waste flue gas condenses into water, and the acid gases such as CO2, NOX, SO2 in the waste flue gas are also dissolved in the condensed water at the same time. Therefore, The utility model also adds a condensed water neutralization tank, so that the condensed water is not directly discharged at the condensed water discharge outlet pipe flowing through the bottom surface of the shell, but then enters the condensed water neutralization tank to neutralize with the preset weak alkali The agent is neutralized and then discharged, so that the discharged wastewater will no longer pollute the environment.

The flue heat collecting and energy-saving device of the domestic gas water heater of the utility model is not only simple in structure, small in size, and low in manufacturing cost, but also easy to install and use, and low in use cost, and can be easily connected with the existing domestic gas water heater. There is no need to change the structure of the original domestic water heater.

The effective diameter of the flue heat collecting and energy-saving device of the household gas water heater of the utility model exceeds the flue of the household gas water heater. After testing, the airflow and pressure of the exhaust pipe of the household gas water heater have not changed, and will not affect the performance of the household gas water heater. normal work.

The flue heat collecting and energy-saving device of the household gas water heater of the utility model is also safe, specifically shown as: the heat collecting and energy-saving device of the household gas water heater flue of the utility model works in series in the water inlet channel of the tap water pipe, and is a passive device , does not require an external power supply; when the household gas water heater is turned on, the heat collecting and energy-saving device for the flue of the household gas water heater of the utility model runs together, and when the gas water heater is turned off, it automatically stops; the heat collecting and energy-saving device for the flue of the household gas water heater of the utility model does not Affect the utility model of the original smoke exhaust pipe of household gas water heater and the safety of smoke exhaust; the heat collection and energy saving device of the household gas water heater flue of the utility model is because the heating process in the smoke exhaust pipeline is not sprayed by an open flame, and the water pipe water preheated by circulation The pressure is the same as that of a domestic gas water heater, and the temperature of the outlet water is only 20 degrees higher than that of the inlet water. If the gas exhaust pipe of the domestic gas water heater is turned off, the temperature will also drop rapidly, and the tap water in the water pipe for circulating preheating will no longer heat up. Therefore, the utility model The service life of the flue heat collection and energy saving device of the domestic gas water heater is more than 8 years.

In order to prove the actual effect of the flue heat collection and energy saving device of the household gas water heater of the present utility model, and connect the heat collection and energy saving device of the household gas water heater flue of the present utility model with a 10L energy rate gas water heater through pipelines and use them together, after specific The test results are shown in Table 1.

Table 1 The measured data in the laboratory

Note: The energy-saving device is the flue heat-collecting energy-saving device of the household gas water heater of the utility model. Analysis of the data in Table 1:

Since the energy absorbed by each degree of water temperature increase is equal, the difference in the temperature increase value of the outlet water under the same flow rate can be used to reflect the percentage efficiency of energy saving.

When the flow rate is 400L/h, (63-24)/(59-24)-1=11.4%,

When the flow rate is 350L/h, (71-25)/(66-25)-1=12.2%,

When the flow rate is 300L/h, (79-25)/(72-25)-1=14.9%,

It can be seen that after using the flue heat collecting and energy saving device of the household gas water heater of the present utility model, when the flow rate is 400L/h, the percentage of energy saving is 11.4%. When the flow rate is 350L/h, the percentage of energy saving is 12.2%. When the flow rate is 300L/h, the percentage of energy saving is 14.9%.

Under the condition of setting the same firepower of domestic gas water heaters, the smaller the outlet water flow rate, the higher the temperature of the discharged high-temperature exhaust gas, and the more waste heat that can be absorbed and utilized. When the water flow rate reaches 300L/h, the waste heat increases the outlet water temperature by 7 degrees compared with the same period last year, and the exhaust gas temperature is almost room temperature, which is only 5 degrees higher than the inlet water temperature, which is already lower than the flue heat collection and energy saving of the household gas water heater of the utility model. The water temperature at the water outlet of the device, and the thermal efficiency at this time reaches the highest value.

Description of drawings:

Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.

Fig. 1 is a structural schematic diagram of a flue heat collecting and energy-saving device for a domestic gas water heater of the present invention.

Fig. 2 is a schematic diagram of the flue heat collecting and energy-saving device of the household gas water heater of the present invention after removing the left partition and the like.

Fig. 3 is a schematic diagram of the use state of the flue heat collecting and energy saving device of the household gas water heater of the present utility model.

Detailed ways:

The flue heat collection and energy saving device of the domestic gas water heater of the present utility model will be further described in detail in conjunction with the accompanying drawings.

Referring to Fig. 1, Fig. 2 and Fig. 3, the utility model flue heat collecting and energy-saving device for household gas water heater includes the shell 1, the condensing heat exchanger, the water inlet pipe 12, the Outlet pipe 14 and described front and rear covers 17,18.

The bottom surface of the shell 1 is provided with inlet and outlet pipe holes 2, 3 and a condensed water discharge pipe 4, and the other end of the condensed water discharge pipe 4 is connected with a condensed water neutralization tank 22, the described A waste water outlet pipe 21 is provided on one side of the neutralization tank 22 in the condensed water, and a thermal insulation coating 20 is coated on the inner wall of the shell 1 , and a condensing heat exchanger is built in the shell 1 .

The condensing heat exchanger is composed of vertically and segmentally arranged fins 5, respectively horizontally arranged in series on the fins 5, and water pipes 6 arranged at vertical intervals and corresponding holes on the fins 5. The front and rear ends of the corresponding holes at both ends of the water pipes 6 on the fins 5 that are longitudinally and segmentally arranged are extended with flanges 71, 72, 81, 82 and are respectively sleeved on the fins that protrude longitudinally and are arranged in segments. 5. The left and right partitions 7 and 8 on the two ends of the two outer water pipes 6 and the ends of the water pipes 6 extending from the upper holes of the left and right partitions 7 and 8 respectively form a "U" shape that communicates with each other. The elbow 9 constitutes. The upper and lower end surfaces of the left and right partitions 7, 8 and the vertically and segmentally arranged fins 5 are sealed and connected with the upper and lower inner walls of the housing 1 by sealant.

The water inlet pipe 12 is fixed at the water inlet pipe hole 2 on the bottom surface of the shell 1, and the water inlet pipe 12 is formed with the water inlet 10 of the water pipe 6 protruding from the hole on the left partition 7. The other end of the water inlet pipe 12 is connected with a valve 11 .

The water outlet pipe 14 is fixed at the water outlet pipe hole 3 on the bottom surface of the housing 1, and the water outlet pipe 14 is formed with the water outlet 13 of the water pipe 6 protruding from the hole on the left partition 7. connected.

The front and rear covers 17, 18 are respectively provided with a smoke inlet and outlet 15, 16, and the inner wall of the front cover 17 is coated with a heat insulating coating 19, and the front and rear covers 17 , 18 respectively form a fixed sealing connection with the front and rear ends of the shell 1, at the same time, the flanges 71, 72, 81, 71, 72, 81, The outer end surface of 82 is also formed by sealing glue to be sealed and connected and fixed with the inner wall of described front and rear covers 17,18 respectively.

To use the flue heat collection and energy saving device of the household gas water heater of the utility model, as long as the smoke inlet 15 on the front cover 17 of the household gas water heater flue heat collection and energy saving device is connected with the smoke outlet of the household gas water heater The mouth pipe is connected, and then the other end of the water outlet pipe 14 at the water outlet pipe hole 3 on the bottom surface of the shell 1 is connected with the water inlet pipe mouth of the domestic gas water heater, and then the water inlet pipe hole on the bottom surface of the shell 1 is connected The valve 11 on the water inlet pipe 12 at the 2 places is connected with the tap water pipe. When the household gas water heater is turned on, the tap water first passes through the condensing heat exchanger of the flue heat collection and energy saving device of the household gas water heater of the present utility model for heat exchange. The heat is sent into the shell 1 through the flue gas inlet 15 on the front cover 17 through the flue gas inlet 15 on the front cover 17 from the flue outlet pipe of the domestic gas water heater, and collected In the gaps between the longitudinal and segmented fins 5 of the condensing heat exchanger, the heat of the high-temperature exhaust gas passes through the longitudinally arranged fins 5 of the condensing heat exchanger and the fins arranged in series on the longitudinally arranged fins. The water pipe 6 at the corresponding hole on the sheet 5 absorbs, transmits and heats the low-temperature tap water from the water inlet pipe 12 at the water inlet pipe hole 2 on the bottom surface of the shell 1, and the preheated tap water passes through the The water outlet pipe 14 at the water outlet pipe hole 3 place on the bottom surface of the shell 1 is sent into the water inlet pipe mouth of the domestic gas water heater for further heating to meet the needs of the shower.

When the flue heat collecting and energy-saving device of the household gas water heater of the utility model is used, acid condensed water will be generated in the shell 1, and the acid condensed water can pass through the other part of the condensed water discharge port 4 on the bottom surface of the shell 1 One end enters into the connected condensed water and tank 22, and after being neutralized by the weak base neutralizer preset therein, it is discharged from the waste water outlet pipe 21 on one side of the condensed water and tank 22.

The flue heat collecting and energy-saving device of the domestic gas water heater of the utility model has the advantages of simple structure, convenient use, low temperature of exhausted flue gas, and no pollution of discharged condensed water.

The flue heat collecting and energy-saving device of the household gas water heater of the utility model is suitable for being connected with the household gas water heater for matching use.

Claims (4)

1. A domestic gas water heater flue heat collection and energy-saving device, which comprises a shell (1), is characterized in that the bottom surface of the shell (1) is provided with inlet and outlet pipe holes (2), (3) and The condensed water discharge pipe (4), the shell (1) has a built-in condensing heat exchanger, and the condensing heat exchanger is composed of fins (5) arranged longitudinally and in sections, respectively mounted in series on the fins (5) The water pipes (6) at the corresponding holes are uniformly arranged vertically at intervals, and the two ends of the water pipes (6) on the fins (5) arranged vertically and segmentally are evenly distributed on it. The front and rear ends of the holes are all extended with flanges (71), (72), (81), (82) and are respectively sleeved on the water pipes ( 6) The left and right clapboards (7), (8) on the ends of the two ends are respectively connected with the ends of the water pipes (6) extending out from the upper holes of the left and right clapboards (7), (8). It is composed of a "U"-shaped elbow (9), and the upper and lower end faces of the left and right partitions (7), (8) and the vertical and segmented fins (5) are connected to the shell ( The upper and lower inner walls of 1) are sealed and connected by sealant, and the water inlet pipe hole (2) on the bottom surface of the shell (1) is fixed with a water pipe protruding from the hole on the left partition (7). The water inlet (10) of (6) forms a connected water inlet pipe (12) with a valve (11) at the other end, and the water outlet pipe hole (3) on the bottom surface of the shell (1) is fixed with a A water outlet pipe (14) connected to the water outlet (13) of the water pipe (6) at the hole on the left partition (7) is formed, and the front and rear ends of the housing (1) are respectively connected with the belt The front and rear covers (17), (18) with inlet and outlet flue gas ports (15), (16) form a fixed sealing connection, and the front and rear ends of the left and right partitions (7), (8) The outer end faces of the extended flanging (71), (72), (81), (82) are also at the same time respectively at the opposite place with the inner walls of the front and rear covers (17), (18) to form a sealed connection and fixation by sealant . 2. The flue heat collection and energy saving device for domestic gas water heaters according to claim 1, characterized in that a heat insulating coating (19) is provided on the inner wall of the front cover (17). 3. The flue heat collection and energy saving device for domestic gas water heaters according to claim 1, characterized in that a heat insulating coating (20) is provided on the inner wall of the housing (1). 4. The flue heat collection and energy saving device for household gas water heaters according to claim 1, characterized in that the other end of the condensed water discharge pipe (4) on the bottom surface of the housing (1) is connected with a waste water outlet pipe The condensed water of (21) neutralizes the tank (22).

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